JP2010523957A - Tourbillon movement for timepieces - Google Patents

Abstract

The present invention relates to a movement for a timepiece, which comprises a housing (10, 12); a power source; a train wheel (14) driven by the power source; Mounted on the frame (10, 12) and mounted via a bearing so as to vibrate on the flange (26) for a tourbillon (18) driven by the train wheel (14); A fixed car (16), and a control member (34) that engages and maintains the Tianfu (32) and the fixed car (16). With escapement (16, 34). In this movement, the bearing is arranged so that the Tianfu (32) vibrates around the second rotation axis (BB) inclined with respect to the first rotation axis (AA). .
[Selection] Figure 1

Description

  The present invention relates to a tourbillon movement for a timepiece. Such movements are well known by those skilled in the art. A tourbillon is a device that makes it possible to improve the accuracy of the timepiece. The tourbillon has a saddle rotatably attached to the frame of the timepiece, and a heaven mounted so as to vibrate in the saddle. The vibration movement of Tianfu is usually maintained by the escapement also mounted on the fence. The heel is driven to rotate by a train wheel, and the last wheel of the train wheel is engaged with a kana fixed to the heel. The escape wheel mounted on the bag meshes with the fixed car.

  Some watchmakers have developed so-called high-speed tourbillons. In such tourbillons, only the ankles are placed in the cage, and the escape wheel is fixed to the frame of the movement. Such a problem solving method is Yale. • It is described in a book titled “Le Tourbillon” by R. Meis (ISBN No. 2-58917-097-8).

  Such a device was the subject of only a few unique timepieces. Although the total inertia of the tourbillon is greatly reduced, it is still quite large for manufacturing reasons and it is difficult to imagine having more than about 12 teeth on a fixed escape wheel. This is the speed at which, for example, if Tianfu vibrates at 3 Hz, the kite must make one revolution in 4 seconds.

  Furthermore, tourbillon-type devices are also known, for example as described in WO 2007/033513, WO 2005/043257, WO 03/017009 and EP 1 564 608. However, in these devices, an escape wheel connected to the ankle is pivotally attached to a tourbillon shaft. Therefore, these documents cannot be taken into account in order to solve the problems associated with the device in which the escape wheel is fixed.

WO 2007/033513 WO 2005/043257 WO 03/017009 EP 1 564 608

Le Tourbillon (ISBN No. 2-58917-097-8), Yale.・ R. Meis

  The present invention is particularly aimed at realizing a tourbillon timepiece having a fixed escape wheel with a reduced rotational speed of the kite.

The timepiece according to the invention is
·frame,
・ Power source,
A train wheel driven by the power source,
A tourbillon kite attached to the frame for rotation about a first axis of rotation and driven by the train wheel;
・ Tenfu attached to the eaves through a bearing so as to vibrate; Have a machine.

  The timepiece according to the present invention is characterized in that the Tianfu bearing is arranged so that the Tianfu vibrates about a second rotation axis inclined with respect to the first rotation axis. . In this way, it is possible to provide a relatively long lever on the control member of the escapement without increasing the overall inertia of the rod. As a result, the number of teeth of the fixed escape wheel & pinion can be increased and the rotational speed of the rod can be reduced.

further,
・ The inclination angle is 15 ° ~ 50 °,
・ The escapement is a lever type,
-It is effective if the escape wheel is of a type having teeth on the outside.

  Other features of the present invention will become more apparent upon reading the following description, made with reference to the accompanying drawings.

It is sectional drawing which shows a part of timepiece movement by this invention.

The part of the timepiece shown is in particular a frame having a main plate 10 and a tourbillon receiver 12,
-A speed-controlled train wheel with only car 14 visible
A fixed escape wheel 16 firmly attached to the main plate 10, and two bearings 20 and 22, one of which is fixed to the main plate 10 and the other of which is fixed to the tourbillon receiver 12 A tourbillon 18 that is rotatably mounted between and is rotatable about a rotation axis AA perpendicular to the surface of the main plate 10.
have.

  The tourbillon 12 comprises a rod 24 formed by two parts 26 and 28 interconnected by a plurality of pillars 30 (only one of the pillars is visible in the drawing), and a pivot It has a Tianfu 32 and an ankle 34 that are rotatably attached to the cage 24.

  The two portions 26 and 28 have a shaft portion assigned with reference numerals 36 and 38, respectively, and a plate member assigned with reference numerals 40 and 42, respectively. The two shaft portions 36 and 38 include pivot shafts 36a and 38a, respectively. Further, the shaft portion 38 forms a pinion 38 b that engages with the wheel 14.

  The shaft portion 36 and the plate member 40 are connected to each other so as to rotate integrally. The plate member is inclined at an angle of about 60 ° with respect to the shaft portion. A hole is formed in the plate member, and a Tianfu bearing (not shown) has been conventionally filled in a mortise. The Tianfu bearing has conventionally received one of the Tianfu 32 shafts.

  The shaft portion 38 and the plate member 42 are connected to each other so as to rotate integrally. The plate member includes a first portion 42a that is inclined with respect to the shaft portion 38 and parallel to the plate member 40, and a second portion 42b that is disposed perpendicular to the central axis of the shaft portion 38. is doing. A hole is formed in the first portion 42a so as to be aligned with a hole provided in the plate member 40, and the hole constitutes a second bearing of the Tianfu 32. Axis BB is formed. Another hole is formed in the second portion 42b, and a stone 44 that forms a bearing for the ankle 34 is embedded in this hole. Further, the ankle is pivotally supported by the second stone 46 supported by the receptacle 48 and pivoted. The receiver 48 is fixed to the second portion 42b using a screw indicated by a broken line.

  The ankle 34 has an ankle stem 50 which is pivotally attached to the bearings 44 and 46, and the central axis of the ankle stem is parallel to the rotation axis AA. The pallet fork 50 includes a member 52 formed by two claws 52 a, their support portions 52 b, and the pallet fork 54 that are firmly fixed to the pallet fork. The member 52 is substantially provided in a plane perpendicular to the rotation axis AA. The two claws 52a are engaged with the fixed wheel 16.

  The ankle cage 54 includes a portion 54a that engages with the ankle stem 50, and a tail-like portion 54b that is inclined in a direction substantially parallel to the plate member 40 and the second portion 42b of the plate member 42. The caudal portion extends to the vicinity of Tianfu 32 and transmits power to Tianfu 32 through a plate 56 that rotates integrally with the axis of Tianfu 32.

  Due to the fact that the pallet is inclined, the length of the pallet can be increased so that the pallet only needs to be rotated by a relatively small angle with respect to a certain swing angle of the heaven. In this way, the number of teeth per rotation can be increased, and the rotation speed of the tourbillon can be reduced. According to this structure, it is possible to realize a car having 30 teeth, and in the case of Tianfu that vibrates at 3 Hz, such a gear can rotate the tourbillon once in 10 seconds.

  In the embodiment described so far, the ankle rotates about a rotation axis parallel to the rotation axis of the rod. It is also possible to use an ankle having a pivot axis parallel to the pivot axis of Tianfu. In this case, it is effective that the fixed escape wheel & pinion has the tooth part provided in the cone which cut | disconnected the head.

  In both aspects described above, it is also possible to use a fixed escape wheel with an inner tooth, and the ankle claws are directed outward.

  Other types of escapements can also be used. Thus, other aspects can be made possible by inclining Tianfu with respect to the axis of rotation of the kite. Even in the case where the center of gravity of Tianfu is substantially on the axis of rotation of the kite, it is possible to make a structure in which the plate of Tianfu is provided at a position greatly removed from this axis of rotation.

  According to this type of arrangement, it is also possible to use an escapement in which at least every other vibrational force is applied directly to Tianfu without passing through the ankle. In this case, the ankle is replaced by a control member attached to the Tianfu, which releases the tourbillon when the Tianfu receives a vibration force.

  It is even possible to use a straight escapement such as a cylinder escapement. In this case, the control member connected to Tianfu is formed by the cylinder.

  The tourbillon described so far rotates in contact with two bearings arranged at both ends in the axial direction. It is very clear that the same principle can be applied to a flywheel type tourbillon.

  In another variant, not shown, the movement can have two tourbillon scissors in which the first scissors are pivotally mounted on the second scissors. Then, the fixed car 16 is attached to the second cage. In this case, the axis of rotation of the first kite in which Tianfu vibrates is inclined with respect to the axis of Tianfu.

  Thus, the escape wheel is fixed and the tourbillon is improved while improving the accuracy of the portable watch by the fact that the Tianfu is inclined with respect to the axis of rotation of the gutter attached inside so that the Tianfu vibrates. A tourbillon in which the kite rotates at a reasonable speed can be realized.

Claims (6)

・ Frame (10, 12),
・ Power source,
A train wheel (14) driven by the power source,
A tourbillon (18) collar (26) attached to the frame (10, 12) rotatably about the first rotational axis (AA) and driven by the train wheel (14);
・ Tenfu (32) attached to the cage (26) through a bearing so as to vibrate; And escapement (16, 34) having a control member (34) for maintaining the Tianfu (32)
A timepiece movement having
The bearing is arranged so that the Tianfu (32) vibrates around a second rotation axis (BB) inclined with respect to the first rotation axis (AA). Movement.   The movement according to claim 1, wherein an inclination angle between the two rotating shafts is 15 ° to 50 °.   The movement according to claim 1, wherein the escapement is of a lever type.   4. Movement according to any one of claims 1 to 3, characterized in that the fixed escape wheel (16) is of the type having teeth on the outside.   5. The tourbillon (18), wherein the collar (26) rotates in contact with two bearings (44, 46) arranged at its ends. Movement according to item.   The movement has two tourbillon scissors, the first scissors are pivotally mounted on the second scissors, and the fixed wheel (16) is mounted on the second scissors The Tianfu vibrates inside the first fence, and the rotation axis of the first fence is inclined with respect to the pivot axis of the Tianfu. Movement according to item.

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